Fix #3784 : add an enum for Error kind#3785

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aesteve wants to merge 5 commits intoscala:masterfrom

aesteve:enum-for-error-kinds

Commits on Jan 10, 2018

fix #3784
Arnaud ESTEVE
committed
put back old error msg
Arnaud ESTEVE
committed
rename kind as category, and use a Scala case class instead of a Java enum
Arnaud ESTEVE
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Commits on Jan 11, 2018

respect scala convention
Arnaud ESTEVE
committed

Commits on Jan 15, 2018

Merge remote-tracking branch 'upstream/master' into enum-for-error-kinds
aesteve
committed